Housing with cover for electrical device and electrical device with housing

Abstract

A housing (11) of an electrical device (10) for converting electrical power comprises a base body (12) and a cover (13), wherein the cover (13) closes the base body (12) to produce a closed interior space, wherein electrical components and electronic components of the electrical device (10) are arranged in the interior space of the housing (11). The cover (13) is connected to the base body (12) via a releasable fixing (14), wherein the fixing (14) is arranged at the geometric center of the cover (13). The electrical device (10) comprises such a housing (11).

Description

Technical Field

[0001] The invention relates to a housing of an electrical device for converting electric power, and an electrical device having a corresponding housing. Background Art

[0002] An electrical device in the sense of the disclosure processes electrical power, in particular by converting the current from one form to another, for example converting direct current into alternating current or vice versa, or by deliberately changing essential properties of the electrical power, such as voltage or frequency. The electrical device can in particular be a power electronic device, i.e. a power converter, in which power switches are arranged in a converter topology and interact with capacitors and inductors.

[0003] During operation of the electrical device, the voltage and current applied to the interface of the power converter are specifically influenced by causing the power switch to operate in a suitable rhythmic manner. Large electrical powers can flow through the electrical device and be converted between devices connected to the electrical device. An energy source, in particular a power supply network, a generator or a battery can be connected to an energy sink, in particular a load, a battery or in turn to a (further) power supply network, for example, via a power converter in a housing according to the invention.

[0004] In the scope of renewable energy, inverters for grid power supply, such as photovoltaic inverters, are usually designed for power from about one kilowatt. This also applies to battery converters, which are connected to storage devices and, for example, supply power to an independent power supply network. Usually, power greater than ten kilowatts is also converted in electrical devices with a housing. For larger energy generation equipment, the rated power of each power electronic device can be in the megawatt range, wherein a voltage in the kilovolt range and a current in the kiloampere range are generated. The rated power is generally not limited upward and is basically related to the available power switches, suitable topologies, achievable power density, materials and the like. In principle, the volume of the corresponding housing increases with the rated power of the electrical device, so that other mechanical solutions can be used under very large power, especially the switch cabinet that replaces the housing.

[0005] The housing of the electrical device must meet different standard requirements depending on the application area. In particular, the housing can isolate the interior of the device from the surrounding environment and seal it, for example, dust-tight and waterproof, so that the housing has an IP protection class according to DIN EN 60529 and / or a NEMA protection class corresponding to NEMA Standard 250-2003. In addition, the housing must be able to pass further mechanical tests according to DIN standards and / or UL standards, for example with respect to compression, impact tests, external influences such as bird impact and / or specific water injection.

[0006] The use of high electrical powers by electrical devices results in a high accumulation of energy in the shortest possible time in the housing of the device. This would be desirable, for example, if capacitors or inductors were used for intermediate storage of electrical energy within the framework of a dynamic conversion from the current form to another form. However, undesirable accumulations of energy can also occur, particularly in the event of a fault, in the event of a faulty operation or after unforeseen aging processes. The electrical energy can be converted to a large extent into thermal and / or mechanical energy, for example in such a way that components heat up strongly and explode, or in such a way that flammable materials accumulated in the housing are ignited, for example, as a result of (electro)chemical conversion processes and by discharge sparks that are harmless in themselves.

[0007] As a result, significant overpressures can occur in the self-enclosed housing of the electrical device. In the case of power electronic converters, for example, with the usual degree of protection IP44 or IP65, overpressures can also occur very quickly, for example within a few milliseconds, under unfavorable circumstances. However, this must not lead to the housing being damaged in an unforeseeable manner, for example by rupturing it uncontrollably and components being ejected from the interior.

[0008] As long as the housing is not designed with a significant expenditure of material in such a way that it is subject to any foreseeable overpressure, the overpressure in the interior of the housing can be reduced by providing a pressure relief opening. At the same time, however, in order to comply with important standards, it is necessary that the housing is designed in such a way that it adequately protects the interior in normal operation, provides mechanical stability against external influences and is optionally sealed in a watertight or even airtight and dusttight manner.

[0009] These two objectives (on the one hand, adequately protecting the interior and the power electronics arranged therein from the surroundings during normal operation and on the other hand, providing a sufficiently large pressure relief opening in a controlled manner in the event of overpressure) are initially functionally opposed to one another and greatly limit the available solution space.

[0010] Various solutions are known from the prior art which are intended to ensure a more or less controlled and as safe as possible pressure reduction of an overpressure which may suddenly occur in an inherently closed housing.

[0011] DE 20 2014 100 486 U1 discloses a housing with a cover for an inverter, wherein the cover is mounted on the housing via a deformable fixing element, wherein the fixing element deforms when an overpressure suddenly occurs in the housing and releases a gap between the cover and the housing, via which the overpressure can be reduced.

[0012] DE 20 2015 106 657 U1 discloses a housing for receiving electronic components, wherein a cover is connected to the housing body at a plurality of fixing points, wherein a notch is provided in the region of at least one of the fixing points, which notch enables deformation of the housing in the event of overpressure in the interior space, so that the overpressure can be reduced by a gap generated between the housing body and the cover.

[0013] US 2016 249 467 A1 discloses a pressure reduction mechanism for a housing of an electrical device, wherein a pressure reduction opening in the housing is closed by an external cover which is pulled inward by a spring so that the cover is pressed outward by excess pressure and releases the opening.

[0014] EP 0 435 123 A1 discloses a housing having a pressure relief wall which is formed by two pressure relief flaps arranged in mirror symmetry and resting against each other in the middle, wherein the pressure relief flaps are rigidly connected to the housing wall by means of a fastening flange and can vibrate in the event of an overpressure by means of a targeted thinning of the fastening flange. It is noted that a bulging of the surface of the pressure relief flaps is avoided, since this prevents the pressure relief flaps from vibrating; however, if vibrations actually occur, components can pass from the interior into the surroundings without hindrance.

[0015] From US2013 143 478A1 a housing for an electrical device is known, in which a pressure relief opening is provided, which is formed by four triangular gate plates, the sides of which abut against each other and the bases of which form a square, wherein the gate plates are respectively connected to the housing only at their bases and have targeted thinning areas along their bases, so that all the gate plates bend outward and upward in the event of overpressure in the housing and release the pressure relief opening.

[0016] The known solutions cannot provide a sufficiently large opening for pressure reduction quickly enough in the event of a sudden overpressure in the interior of the housing and at the same time meet the requirements mentioned above on the mechanical properties of the housing, which should be suitable in particular for electrical devices converting high electrical power. Summary of the invention

[0017] The object of the present invention is therefore to provide a housing for an electrical device which withstands the usual environmental conditions and conditions of use of the device and which at the same time can provide a large pressure relief surface within such a short time that a sudden overpressure can be reduced in a controlled manner, wherein components arranged in the interior of the housing are retained and safety is thereby increased.

[0018] This object is achieved by a device having the features of the invention.

[0019] The housing of an electrical device for converting electrical power comprises a base body and a cover. The cover closes the base body, thereby creating a closed interior space: the electrical components and electronic components of the electrical device are arranged in the interior space of the housing. The cover is connected to the base body by a releasable fastener. The housing is characterized in that the fastener is arranged at the geometric center of the cover.

[0020] The object on which the invention is based is thus achieved in that the electrical device has a closed housing as a protective device, wherein a releasably fastened cover of the housing is designed as an environmental protection device with an integrated overpressure protection device. In the event of a sudden overpressure, the entire surface of the central fastening part serves as an effective surface for pressure peaks and pulses. The cover is prevented from deforming here only by its rigidity. As a result, the cover serves as an overpressure protection device and achieves a sufficient pressure reduction.

[0021] At the same time, the cover is fixedly held on the substrate by a central fixing. The fixing is arranged in the center of the cover so that it is equidistant from all edges of the cover on average. Certain deviations from the exact geometric center are possible, for example, due to structural or purely optical reasons. The surface of the cover that is subjected to internal pressure thus corresponds essentially to a circular ring in the case of a circular cover or essentially to a "square ring" in the case of a square cover. As long as the circular ring is deformed and thus (partially) opened, the circular ring also blocks a possible component that is detached from the interior of the electrical device or turns the component at least laterally. In this regard, the cover protects the surroundings of the electrical device from pressure waves and minimizes human hazards.

[0022] The cover is in particular only fixed to the base body by a centrally arranged fixing and is not connected to the base body by other fixings. It is understood that relatively weak connections between the cover and the housing, such as adhesion of a seal, simple chamfers or guide hooks are not to be understood as fixings.

[0023] In one embodiment of the housing, the base body has a rear wall and side walls, and the cover has a sealing surface extending substantially in a plane. The cover then lies with its sealing surface on the edge of the side wall of the cover. It is understood that the side wall can be formed from a single component; in this regard, the housing also includes a circular rear wall and correspondingly continuous side walls.

[0024] A circumferential seal can be arranged between the edge of the side wall of the base body and the cover. Pressure is applied to the seal via the cover by means of a fixing element. The pressure is dependent on the rigidity of the cover and can be adjusted in such a way that the housing can be sealed. This ensures a protection class of at least IP45, preferably at least IP65 and / or NemaType 4X for the interior of the housing.

[0025] The entire cover structure with a centrally placed fixing and a surrounding seal is designed so that the electrical device can be operated permanently and safely under all weather conditions and under all electrical parameters. For this purpose, in particular, the cover rigidity is measured so that the cover is sufficiently rigid on the one hand so that the pressing force is transmitted from the central fixing through the cover surface to the edge and the seal so that the seal is subjected to the required compression force. At the same time, the cover has such an optimized rigidity that the cover can be deformed around the fixing relative to the centrally placed under a certain internal pressure. Thus, an optimized opening surface for pressure relief can be generated and the pressure is slowly dissipated. In addition, the load of the fixing and the holding device including the fixing is reduced as a whole during an explosion, in that the cover is deformed and the effective surface for the internal pressure is reduced, so that the cover is not torn at the fixing.

[0026] The holding device can include a crossbeam, which is fixed to opposite points of the side wall of the base body. The crossbeam serves as a counterpart for an externally arranged and releasable fastening element, so that a releasable connection between the cover and the crossbeam can be established by means of the fastening element.

[0027] The housing can have four side walls, which are arranged substantially perpendicular to the rear wall of the housing. The crossbeam can then advantageously be arranged diagonally between two opposite corners of the side walls. The housing is particularly rigid at the corners of the side walls, so that the connection of the crossbeam to the corners of the housing increases the load on the holding device. Furthermore, by arranging the crossbeam diagonally, two corners of the housing are freely available, wherein one of the housing corners can in particular comprise an interface region of the electrical device. The interface region is then largely freely available when the cover is opened, so that the crossbeam can remain in the device when the device is put into operation and no additional assembly effort is incurred.

[0028] Instead of or in addition to the crossbeam, the base body can have a dome which extends from the rear wall of the housing to the geometric center of the lid. The dome can have a mating element with a fastening element on the side facing the lid, so that a releasable connection between lid and dome can be established by means of the fastening element. Such a centrally arranged dome, when fastened to the rear side of the base body, provides optimal availability of the interior of the housing when the lid is opened.

[0029] The fastener can be designed in particular to be screwable and include a screw or a nut. The screw head or the nut is arranged on the outside of the cover. The mating thread for the screw or the outwardly directed threaded rod for the nut can be arranged on the crossbar or the dome. The dome itself can in particular include a rod or a tube, which extends from the rear wall through the interior and the cover, so that the fastener can be screwed directly onto the rod or into the tube.

[0030] In a further embodiment, a reinforcing plate can be arranged between the bolt head or nut and the cover, the reinforcing plate preferably being connected to the cover in a force-fitting and / or materially bonding manner. The reinforcing plate has a diameter, in particular, between twice the diameter of the bolt head or nut and half the diameter of the cover. This prevents forces acting on the cover from the inside from acting only on the fastening element itself due to overpressure and tearing the cover around it.

[0031] The housing according to the invention can particularly advantageously accommodate power electronic components in the interior space, including switches, capacitors and / or inductors, which are provided for converting electrical power in the device.

[0032] In the event of an overpressure in the interior of the housing, in particular in the event of a sudden overpressure, such as can occur in electrical devices with high power, the cover can be lifted from the edge of the side wall on all sides, in particular along the surrounding seal, and plastically deformed. This achieves a pressure reduction on all sides. In addition, the plastic deformation leads to a pressure relief for the fixing element and the retaining device corresponding to the fixing element, because the surface acted upon by the overpressure is reduced by the deformation of the cover. The tensile forces acting on the fixing element are also reduced as a result.

[0033] The cover can preferably consist of or contain a ductile material which can be permanently plastically deformed under load. In particular, aluminum-magnesium alloys, such as AlMg3 or deep-drawn steel sheets, have a suitable relationship between tensile strength and yield strength. The energy of the pressure wave released in the explosion is dissipated by the plastic deformation of the cover. It is particularly advantageous if the material has an elongation at break of >6%, in particular in order to prevent the cover from tearing at the fastening element.

[0034] In a further embodiment, the edge of the cover has a circumferential chamfer so that the edge of the cover is oriented substantially parallel to the side wall of the base body. As a result, the cover can be mounted on the base body particularly easily with a precise fit and any seals are protected and / or supported laterally by the chamfer, that is to say, if necessary, lateral shrinkage is prevented.

[0035] In a particularly preferred embodiment, the electrical device comprises a power converter, in particular a rectifier, an inverter and / or a DC / DC converter. The power converter can have a rated electrical power of at least 1 kW, preferably at least 10 kW. In the area of ​​power converters with rated powers in the range of tens to hundreds of kW, technical advances have led to an increase in power density, which simultaneously exacerbates the problems mentioned at the beginning of the undesirable energy accumulation and therefore requires a housing that is matched to the correspondingly increased risk.

[0036] The electrical device according to the invention has a housing with the characteristics described and comprises a first interface and a second interface for exchanging electrical power with a separate device. Here, the first interface can be provided for connection with a first energy source or a first energy sink, in particular a generator or a battery, and the second interface can be provided for connection with a second energy source or a second energy sink, in particular an energy supply network.

[0037] In one embodiment, the device is a photovoltaic inverter or a battery bidirectional inverter for connection to an AC voltage network.

[0038] In a further embodiment, the device is a DC / DC converter for connecting a photovoltaic generator or a battery to an inverter or a load, wherein the load may include a direct voltage network.

[0039] In particular, energy supply networks and / or batteries are particularly powerful energy supply units that achieve a particularly high energy storage capacity, so that the housing of the device must be designed accordingly. This applies in particular to electrical devices with a rated power of at least 1 kilowatt and even more so to electrical devices with a rated power of at least 10 kilowatts. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The invention is explained and illustrated in greater detail below with reference to the exemplary embodiments shown in the drawings.

[0041] Figure 1 A first embodiment of the device according to the invention is shown;

[0042] Figure 2 A cross-sectional view showing a further embodiment of the device according to the invention;

[0043] Figure 3 A cross-sectional view showing a further embodiment of the device according to the invention;

[0044] Figure 4 A further embodiment of the device according to the invention is shown.

[0045] Figure 5 A further embodiment of the device according to the invention is shown, and

[0046] Figure 6 The dynamic behavior of the device according to the invention is shown. DETAILED DESCRIPTION

[0047] Figure 1 An electrical device 10 is shown having a housing 11. The housing 11 comprises a base body 12. The base body 12 can be designed in one piece, for example as a die-cast part, or can be composed of several parts, in particular of a rear wall and side walls. In principle, the base body can have a plurality of parts according to the invention. Figure 1 The base may have a substantially rectangular plan view, whereby the base includes four substantially flat side walls, or a circular or elliptical plan view (not shown), whereby the base has substantially surrounding side walls.

[0048] The housing 11 comprises a cover 13. The base body 12 and the cover 13 form a closed interior space of the housing 11, in that the cover 13 is placed with a force fit on the edge of the side wall of the base body 12. Possible openings on the side walls and / or rear wall of the base body 12, for example for the passage of cables, can themselves be formed with suitable sealing devices.

[0049] The cover 13 is detachably connected to the base body 12 via a central fixing element 14. The fixing element 14 can be connected to the base body 12 in a detachable manner. Figure 1 The fastener 14 is designed as a screw, the screw head of which is arranged on the outside of the cover 13 and which is screwed into a thread arranged in the interior of the housing 11. Alternatively, other embodiments of the releasable fastener 14, such as a nut on a threaded rod extending from the outside of the cover 13, a plug connection with a locking device or the like are conceivable. However, the fastener 14 is the only fastener, by which a defined, permanently stable and releasable connection between the base body 12 and the cover 13 is established.

[0050] Figure 2 The cross section of the housing 11 with components of the base body 12, in particular the edge regions of the side walls and the cover 13, is shown. A crossbar 15 is arranged between the side walls of the base body 12. The fixing element 14 establishes a detachable connection between the cover 13 and the crossbar 15 and thus to the base body 12. The crossbar 15 can be connected according to Figure 2 It is placed on the edge of the side wall of the base body 12 and fixed there or connected to the side wall of the base body 12 in another way, and if necessary also detachably connected (see Figure 4 ).

[0051] The force applied to the cover 13 by the fixing part 14 is transmitted to the edge of the cover 13 via the surface of the cover 13. As a result, the seal 16 arranged between the cover 13 and the edge of the side wall of the base 12 can be compressed and seal the transition between the base 12 and the cover 13. The force acting on the seal 16 can be selected according to the design and application scope of the device 10 so that the corresponding required tightness of the housing 11 is achieved. In this case, the force generated on the seal 16 is also related to the specific material properties of the cover, in particular the rigidity of the cover, and the structural limitations of the fixing part, such as the thread length of the screw or the like. In this case, the material properties of the cover 13, in particular the rigidity of the cover, are designed to achieve the required compression force on the seal 16.

[0052] The seal 16 can be Figure 2 The hollow chamber seal is designed to achieve a good sealing effect even at low forces between the base body 12 and the cover 13. This makes it possible for the housing 11 as a whole to have a protection class of IP45 or higher.

[0053] In accordance with Figure 1 A reinforcing plate 17, for example a washer, can be arranged between the outer action point of the fixing element 14, i.e. the bolt head and the cover 13, and the reinforcing plate can have a circular or polygonal shape. A further spacing element 18, for example a sealing ring or a solid screw block, can be arranged between the cover 13 and the crossbeam 15, which can predetermine a certain distance between the cover 13 and the crossbeam 15 in the region of the reinforcing plate 17. Instead of the crossbeam 15, a dome 19 (see Figure 5 ).

[0054] according to Figure 2 The cover 13 has a substantially flat shape with a circumferential chamfer and can be formed from a simple sheet metal which is brought into a suitable shape, in particular by means of a deep-drawing method.

[0055] Figure 3 FIG. 1 shows a cross section of another housing 11 according to the invention. Figure 2 In contrast to the embodiment of the present invention, the seal 16 is made of solid material or foamed plastic. The seal can be processed more easily and is generally more compact than according to Figure 2 The hollow chamber seal is more compact. Figure 3 A rigid beam is arranged on the cover 13 , which increases the rigidity of the cover 13 and thereby ensures that the force applied to the cover 13 by the fixing member 14 is better transmitted to the edge of the cover 13 through the surface of the cover 13 and thereby ensures the force applied to the seal 16 .

[0056] Figure 4A view of a housing 11 according to the invention is shown with a base body 12 and an opened cover 13. The cover 13 can be detachably connected to a crossbar 15 by means of a fastening 14. The force exerted on the cover 13 by the fastening 14 is transmitted via the surface of the cover 13 to the edge of the cover 13 and there compresses a seal arranged between the cover and the edge (not shown) of the side wall of the base body 12. In this case, the cover 13 has a slightly convex shape, that is, it is arched outwards when viewed from the interior of the housing 11. This achieves a better transmission of the force from the fastening 14 to the seal.

[0057] The crossbeam 15 can be based on Figure 4 Arranged diagonally between the upper corners of the base 12 and connected to the side walls of the base 12. Alternatively, the crossbar 15 can be stretched between any, opposite points of the side walls, i.e. between the following points, the connecting line of which extends through the geometric center of the opening of the base 12, so that the fixing part 14 is arranged in the geometric center of the cover 13.

[0058] The crossbar 15 can be detachably connected to the side walls of the base body 12 or can be fixedly attached to the side walls. The base body 12 can include further edge elements 20, such as guide aids for accurately positioning the cover 13 on the base body 12 or contact pins for establishing potential energy compensation between the base body 12 and the cover 13. However, here too, apart from the fastening element 14, no further defined, permanently stable and detachable connection between the base body 12 and the cover 13 is provided.

[0059] Figure 5 A further view of a housing 11 according to the invention with a base body 12 and an opened cover 13 is shown. The base body has a centrally arranged dome 19 which can be fastened to the rear side of the base body 11 and extends up to below the geometric center of the cover or even through the geometric center of the cover 13. The cover 13 can be releasably connected to the dome 19 by means of a fastener 14. In particular, the dome 19 can have a mating thread into which the fastener 14, for example a screw, is screwed. Alternatively, the dome 19 can extend through the cover 13 so that the fastener 14, for example a nut, can be screwed onto the dome 19.

[0060] Figure 6The simulation of the plastic deformation of the cover 13 in the case of an explosive overpressure in the interior of the electrical device 10 is shown. At the time t=0 ms, an explosive pressure reduction takes place (top left). The cover 13 is placed on the edge of the side edge of the base body 12 at this time and protects the interior of the housing 11 from environmental influences. At the time t=10 ms (top right), the cover 13 is deformed due to the overpressure in the interior and is lifted from the edge of the side edge on all sides. The deformation continues slightly until the time t=20 ms and then stops, after which the overpressure in the interior is reduced. The cover 13 is in the final position (bottom right) at the time t=40 ms.

[0061] Reference numerals list

[0062] 10 Electrical equipment

[0063] 11 Shell

[0064] 12 Matrix

[0065] 13 Cover

[0066] 14Fixing parts

[0067] 15 beam

[0068] 16 Seals

[0069] 17 reinforcement plate

[0070] 18 Seals

[0071] 19 Dome

[0072] 20 edge elements.

Claims

1. A housing (11) of an electrical device (10) for converting electrical power, wherein: The housing (11) comprises a base (12) and a cover (13), wherein the cover (13) closes the base (12) to produce a closed interior space, wherein the electrical components and electronic components of the electrical device (10) are arranged in the interior space of the housing (11), wherein the cover (13) is connected to the base (12) via a releasable fixing (14), wherein the fixing (14) is arranged at the geometric center of the cover (13), characterized in that: The cover (13) is fixed to the base (12) only by a centrally arranged fixing element (14) and is not connected to the base (12) by any other fixing element; The base body (12) has a rear wall and side walls, and the cover (13) has a sealing surface extending substantially in a plane, the cover (13) being placed with the sealing surface on the edge of the side wall of the base body (12); The cover (13) is designed so that, in the event of an overpressure in the interior of the housing (11), it is lifted from the edges of the side walls on all sides and plastically deformed, thereby achieving a pressure reduction on all sides; The cover (13) comprises a ductile material so that the cover (13) can absorb energy by plastic deformation.

2. The housing (11) according to claim 1, wherein: A circumferential seal (16) is arranged between the edge of the side wall of the base (12) and the cover (13), and pressure is applied to the seal via the fixing element (14) through the cover (13), so that the housing (11) can be sealed to ensure a protection degree of at least IP44 and / or Nema Type 4X for the interior space of the housing (11).

3. The housing (11) according to claim 1, wherein: The base body (12) has a crossbeam (15) which is fastened at opposite points of a side wall of the base body (12), wherein a releasable connection between the cover (13) and the crossbeam (15) can be established by means of the fastening means (14).

4. The housing (11) according to claim 3, wherein: The base body (12) has four side walls which are arranged substantially perpendicular to one another, wherein the cross member (15) is arranged diagonally between two opposite corners of the side walls.

5. The housing (11) according to any one of claims 1 to 2, wherein: The base body (12) has a dome (19) which extends from the rear wall of the housing (11) to the geometric center of the cover (13), wherein a releasable connection between the cover (13) and the dome (19) can be established by means of the fixing element (14).

6. The housing (11) according to claim 3, wherein: The fastening element (14) is screwable and comprises a screw or a nut, wherein the screw head or the nut is arranged on the outside of the cover (13), wherein the cross member (15) has a mating thread for the screw or an outwardly directed threaded shank for the nut.

7. The housing (11) according to claim 5, wherein: The fastening element (14) is screwable and comprises a screw or a nut, wherein the screw head or the nut is arranged on the outside of the cover (13), wherein the dome (19) has a mating thread for the screw or an outwardly directed threaded shank for the nut.

8. The housing (11) according to claim 6 or 7, wherein: A reinforcing plate (17) is arranged between the screw head or the nut and the cover (13) in a force-fitting and / or materially bonding manner.

9. The housing (11) according to any one of the preceding claims 1 to 4, wherein: The components in the interior of the housing (11) include power electronic components, which are configured to convert electrical power within the device (10).

10. The housing (11) according to any one of the preceding claims 1 to 4, wherein: The edge of the cover (13) has a circumferential chamfer, so that the edge of the cover (13) is oriented substantially parallel to the side wall of the base body (12).

11. The housing (11) according to any one of the preceding claims 1 to 4, wherein: The electrical device (10) comprises a power converter.

12. The housing (11) according to claim 1, wherein: The ductile material is an aluminum-magnesium alloy or a deep-drawn steel sheet.

13. The housing (11) according to claim 3, wherein: The housing (11) can be sealed so as to ensure a protection level of at least IP65 for the interior space of the housing (11).

14. The housing (11) according to claim 8, wherein: The reinforcing plate (17) has a diameter between twice the diameter of the bolt head or the nut and half the diameter of the cover (13).

15. The housing (11) according to claim 9, wherein: The power electronic components are switches, capacitors and / or inductors.

16. The housing (11) according to claim 11, wherein The power converter is designed as a rectifier, an inverter and / or a DC / DC converter and has a rated electrical power of at least 1 kilowatt.

17. The housing (11) according to claim 16, wherein The power converter has an electrical power rating of at least ten kilowatts.

18. An electrical device (10) having a housing (11) according to any one of the preceding claims 1 to 17, wherein: The device (10) comprises a first interface and a second interface, wherein the first interface is configured to be connected to a first energy source or a first energy sink, and the second interface is configured to be connected to a second energy source or a second energy sink.

19. The electrical device (10) according to claim 18, wherein: The device (10) is a photovoltaic inverter or a battery bidirectional inverter for connection to an AC voltage network.

20. The electrical device (10) according to claim 18, wherein: The device (10) is a DC / DC converter for connecting a photovoltaic generator or a battery to an inverter or a load, wherein the load can include a direct voltage network.

21. The electrical device (10) according to any one of claims 18 to 20, wherein: The device (10) has a rated electrical power of at least one kilowatt.

22. The electrical device (10) according to claim 18, wherein: The first interface is configured to be connected to a generator or a battery.

23. The electrical device (10) according to claim 18, wherein: The second interface is provided for connection to an energy supply network.

24. The electrical device (10) according to claim 21, wherein: The electrical device (10) has a rated electrical power of at least ten kilowatts.

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